Ramset 100 Pack .300" x 2-1/2" #1516 Drive Pin. Using Ramset drive pins will assure you of consistent and optimum quality in every fastener. Ramset drive pins are designed to fasten materials in concrete and steel. Pins are designed to be tough and durable to enable them to penetrate dense concrete and structural quality steel. Pins measure 2-1/2'' in length with a .300 head diameter and .145 shank diameter.